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Temperature MeasurementTransmitters for mounting in sensor head
SITRANS TH400fieldbus transmitters
3/23Siemens FI 01 · 2011
3
■ Overview
SITRANS TH400 fieldbus transmitters
Versions:• For FOUNDATION fieldbus• For PROFIBUS PA
The SITRANS TH400 temperature transmitter is a small field bus transmitter for mounting in the connection head of form B. Exten-sive functionality enables the temperature transmitter to be pre-cisely adapted to the plant’s requirements. Operation is very simple in spite of the numerous setting options. Thanks to its uni-versal concept it can be used in all industries and is easy to in-tegrate in the context of Totally Integrated Automation applica-tions.
Transmitters of the "intrinsically safe" type of protection can be in-stalled within potentially explosive atmospheres. The devices comply with the Directive 94/9/EC (ATEX), as well as FM and CSA regulations.
Installing SITRANS TH400 in temperature sensors turns them into complete, bus-capable measuring points; compact - and in a single device.
■ Application
• Linearized temperature measurement with resistance ther-mometers or thermal elements
• Differential, mean-value or redundant temperature measure-ment with resistance thermometers or thermal elements
• Linear resistance and bipolar millivolt measurements• Differential, mean-value or redundant resistance and bipolar
millivolt measurements
■ Function
Features
General• Mounting in connection head, type B, to DIN 43729, or larger• Polarity-neutral bus connection• 24-bit analog-digital converter for high resolution• Electrically isolated• Intrinsically-safe version for use in potentially explosive areas• Special characteristic• Sensor redundance
with PROFIBUS PA communication• Function blocks: 2 x analog
with FOUNDATION fieldbus communication• Function blocks: 2 x analog and 1 x PID• Functionality: Basic or LAS
Mode of operation
The following function diagram explains the mode of operation of the transmitter.
The only difference between the two versions of the SITRANS TH400 (7NG3214-... and 7NG3215-...) is the type of fieldbus protocol used (PROFIBUS PA or FOUNDATION fieldbus).
SITRANS TH400, function diagram
Optional inputs:- Resistance thermometer- Thermocouple- mV sensor- Resistance-based sensors
Input 1
Input 2
TransformerInput 1Input 2DifferentialMean valueRedundancyTerminal temperatureEngineering units Diagnostic functionsTable linearizationPolynomial linearizationProcess calibration
A/D converter
Complex configurationCorrection coefficientFactory settings
- PROFIBUS protocol (7NG3214) or- Foundation Fieldbus protocol (7NG3215)
Bus connection
Ex
pow
er c
ircui
t
Electrically isolated
Internal Pt100
Communication
EEPROM
CPU
6
5
4
32
1
© Siemens AG 2010
Temperature MeasurementTransmitters for mounting in sensor headSITRANS TH400fieldbus transmitters
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System communication
SITRANS TH400, communication interface
■ Technical specifications
Input
Analog-to-digital conversion
• Measurement rate < 50 ms
• Resolution 24-bit
Resistance thermometer
Pt25 ... Pt1000 to IEC 60751/JIS C 1604
• Measuring range -200 ... +850 °C (-328 ... +1562 °F)
Ni25 ... Ni1000 to DIN 43760
• Measuring range -60 ... +250 °C (-76 ... +482 °F)
Cu10 ... Cu1000, α = 0.00427
• Measuring range -50 ... +200 °C (-58 ... +392 °F)
Line resistance per sensor cable Max. 50 Ω
Sensor current Nominal 0.2 mA
Sensor fault detection
• Sensor break detection Yes
• Sensor short-circuit detection Yes, < 15 Ω
Resistance-based sensors
Measuring range 0 Ω ... 10 kΩ
Line resistance per sensor cable Max. 50 Ω
Sensor current Nominal 0.2 mA
Sensor fault detection
• Sensor break detection Yes
• Sensor short-circuit detection Yes, < 15 Ω
s
s
Output:
Bus terminator
Bus terminator
Segment coupler
Segment coupler
Bus connection
Bus connection
PROFIBUS PA
FOUNDATION Fieldbus
SITRANS TH400 FF
SITRANS TH400 PA
12
12
Thermocouple
to IEC 584 Measuring range
• Type B 400 .. +1820 °C (752 ... 3308 °F)
• Type E -100 ... +1000 °C (-148 ... +1832 °F)
• Type J -100 ... +1000 °C (-148 ... +1832 °F)
• Type K -100 ... +1200 °C (-148 ... +2192 °F)
• Type N -180 ... +1300 °C (-292 ... +2372 °F)
• Type R -50 ... +1760 °C (-58 ... +3200 °F)
• Type S -50 ... +1760 °C (-58 ... +3200 °F)
• Type T -200 ... +400 °C (-328 ... +752 °F)
to DIN 43710
• Type L -200 ... +900 °C (-328 ... +1652 °F)
• Type U -200 ... +600 °C (-328 ... +1112 °F)
to ASTM E988-90
• Type W3 0 ... 2300 °C (32 ... +4172 °F)
• Type W5 0 ... 2300 °C (32 ... +4172 °F)
External cold junction compensa-tion
-40 ... +135 °C (-40 ... +275 °F)
Sensor fault detection
• Sensor break detection Yes
• Sensor short-circuit detection Yes, < 3 mV
• Sensor current in the event of open-circuit monitoring
4 μA
mV sensor - voltage input
Measuring range -800 ... +800 mV
Input resistance 10 MΩ
Output
Filter time (programmable) 0 ... 60 s
Update time < 400 ms
Measuring accuracy
Accuracy is defined as the higher value of general values and basic values.
General values
Type of input Absolute accu-racy
Temperature coefficient
All ≤ ± 0.05 % of the measured value
≤ ± 0.002 % of the measured value/°C
Basic values
Type of input Basic accuracy Temperature coefficient
Pt100 and Pt1000 ≤ ± 0.1 °C ≤ ± 0.002 °C/°C
Ni100 ≤ ± 0.15 °C ≤ ± 0.002 °C/°C
Cu10 ≤ ± 1.3 °C ≤ ± 0.02 °C/°C
Resistance-based sensors ≤ ± 0.05 Ω ≤ ± 0.002 Ω/°C
Voltage source ≤ ± 10 μV ≤ ± 0.2 % μV/°C
Thermocouple, type:E, J, K, L, N, T, U
≤ ± 0.5 °C ≤ ± 0.01 °C/°C
Thermocouple, type:B, R, S, W3, W5
≤ ± 1 °C ≤ ± 0.025 °C/°C
Cold junction compensation ≤ ± 0.5 °C
Reference conditions
Warming-up time 30 s
Signal-to-noise ratio Min. 60 dB
Calibration condition 20 ... 28 °C (68 ... 82 °F)
© Siemens AG 2010
Temperature MeasurementTransmitters for mounting in sensor head
SITRANS TH400fieldbus transmitters
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Conditions of use
Ambient conditions
Permissible ambient temperature -40 ... +85 °C (-40 ... +185 °F)
Permissible storage temperature -40 ... +85 °C (-40 ... +185 °F)
Relative humidity ≤ 98 %, with condensation
Insulation resistance
• Test voltage 500 V AC for 60 s
Mechanical testing
• Vibrations (DIN class B) to IEC 60068-2-6 andIEC 60068-2-644 g/2 ... 100 Hz
Electromagnetic compatibility
EMC noise voltage influence < ± 0.1 % of span
Extended EMC noise immunity:NAMUR NE 21, criterion A, Burst
< ± 1 % of span
EMC 2004/108/EC Emission and Noise Immunity to
EN 61326
Construction
Material Molded plastic
Weight 55 g (0.12 lb)
Dimensions See Dimensional drawings
Cross-section of cables Max. 2.5 mm2 (AWG 13)
Degree of protection
• Transmitter enclosure IP40
• Terminal IP00
Auxiliary power
Power supply
• Standard, Ex "nA", Ex "nL", NI 9.0 ... 32 V DC
• ATEX, FM, UL and CSA 9.0 ... 30 V DC
• In FISCO/FNICO installations 9.0 ... 17.5 V DC
Power consumption < 11 mA
Max. increase in power consump-tion in the event of a fault
< 7 mA
Certificates and approvals
Explosion protection ATEX
EC type test certificate KEMA 06 ATEX 0264 X
• "Intrinsic safety" type of protection II 1 G Ex ia IIC T4...T6II 2(1) G Ex ib[ia] IIC T4...T6II 1 D Ex iaD
EC type test certificate KEMA 06 ATEX 0263 X
• Type of protection for "equipment is non-arcing"
II 3 GD Ex nA[nL] IIC T4...T6II 3 GD Ex nL IIC T4...T6II 3 GD Ex nA[ic] IIC T4...T6II 3 GD Ex ic IIC T4...T6
Explosion protection: FM for USA
• FM approval FM 3027985
• Degree of protection • IS Class I, Div 1, Groups A, B, C, D T4/T5/T6, FISCO
• IS Class I, Zone 0, AEx ia, IIC T4/T5/T6, FISCO
• NI Class I, Div 2, Groups A, B, C, D T4/T5/T6, FNICO
Explosion protection CSA for Can-ada
• CSA approval CSA 1861385
• Degree of protection • IS Class I, Div 1, Groups A, B, C, D T4/T5/T6
• Ex ia IIC T4/T5/T6 and Ex ib [ia] IIC T4/T5/T6
• NI Class I, Div 2, Groups A, B, C, D T4/T5/T6
• Ex nA II T4/T5/T6
Other certificates GOST
Communication
Parameterization interface
• PROFIBUS PA connection
- Protocol Profile 3.0
- Address (for delivery) 126
• FOUNDATION fieldbus connec-tion
- Protocol FF protocol
- Functionality Basic or LAS
- Version ITK 4.6
- Function blocks 2 x analog and 1 x PID
Factory setting
only for SITRANS TH400 PA
Sensor Pt100 (IEC)
Type of connection 3-wire circuit
Unit °C
Failure mode Last valid value
Filter time 0 s
PA address 126
PROFIBUS Ident No. Manufacturer-specific
only for SITRANS TH400 FF
Sensor Pt100 (IEC)
Type of connection 3-wire circuit
Unit °C
Failure mode Last valid value
Filter time 0 s
Node address 22
© Siemens AG 2010
Temperature MeasurementTransmitters for mounting in sensor headSITRANS TH400fieldbus transmitters
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■ Selection and Ordering data Order No.
1) Y01: Quote all details that deviate from the factory setting (see below).2) Can only be ordered together with Y01 (it is essential to specify the mea-
suring range).C) Subject to export regulations AL: N, ECCN: EAR99.
Factory setting: • For SITRANS TH400 PA:
- Pt100 (IEC 751) with 3-wire circuit- Unit: °C- Failure mode: Last valid value- Filter time: 0 s- PA address: 126- PROFIBUS Ident No.: Manufacturer-specific
• For SITRANS TH400 FF: - Pt100 (IEC 751) with 3-wire circuit- Unit: °C- Failure mode: Last valid value- Filter time: 0 s- Node address: 22
■ Dimensional drawings
SITRANS TH400 dimensions in mm (inches) and connections
Mounting on DIN rail
SITRANS TH400, mounting of transmitter on DIN rail
DIN rail adaptor, dimensions in mm (inch)
Temperature transmitter SITRANS TH400
for installation in connection head, with electrical isolation, order instruction manual separately.
• Bus-compatible to PROFIBUS PA
- No explosion protection or Zone 2/Div 2 to ATEX/FM/CSA
} C) 7NG3214-0NN00
- with explosion protection "Intrinsically safe to ATEX/FM/CSA"
} C) 7NG3214-0AN00
• Bus-compatible to FOUNDATION Fieldbus
- No explosion protection or Zone 2/Div 2 to ATEX/FM/CSA
} C) 7NG3215-0NN00
- with explosion protection "Intrinsically safe to ATEX/FM/CSA"
} C) 7NG3215-0AN00
Further designs Order code
Please add "-Z" to Order No. and specify Order code(s) and plain text.
Customer-specific setting of operating data (specify operating data in plain text)
Y011)
with test protocol (5 measuring points) C112)
Accessories Order No.
CD for measuring instruments for temperature
} A5E00364512
With documentation in German, English, French, Spanish, Italian, Portuguese and SIPROM T parameterization software
SIMATIC PDM operating software See Section 9
DIN rail adapters for head transmitters 7NG3092-8KA
(Quantity delivered: 5 units)
Connecting cable4-wire, 150 mm, for sensor connections when using head transmitters in the high hinged cover (set with 5 units)
7NG3092-8KC
for additional PA components, See Catalog IK PI
} Available ex stock.
Terminals 1, 2: Fieldbus connectionTerminals 3 ... 6: Sensor connection
26,3 (1.04)33 (1.3)
Ø 44 (1.73)
Ø 6,3 (0.25)
M4 x 30
s1 2
54
3 6
+ -3-W
50,5 (1.99)
59,6
(2.3
5)33 (1.30)
14 (0.55)
© Siemens AG 2010
Temperature MeasurementTransmitters for mounting in sensor head
SITRANS TH400fieldbus transmitters
3/27Siemens FI 01 · 2011
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■ Schematics
SITRANS TH400, sensor connection assignment
Resistance thermometer ResistanceThermocouple
Voltage measurement
Two-wire system 1)
Three-wire system
Four-wire system
Two-wire system 1)
Three-wire system
Four-wire system
Internal cold junction compensation
Cold junction compensation with external Pt100 in two-wire system 1)
Cold junction compensation with external Pt100 in three-wire system
1) Programmable line resistance for the purpose of correction.
Mean-value/differential or redundancy generation
1 sensor in two-wire system 1)
1 sensor in three-wire system
Mean-value/differential or redundancy generation2 x two-wire system 1)
Mean value, differential or redundancy generation with internal
cold junction compensation
Mean value, differential or redundancy generation and cold junction compensation
with internal Pt100 in two-wire system 1)
Mean value, differential or redundancy generation1 resistor in two-wire system 1)
1 resistor in three-wire system
Measurement of mean value, differential and redundancy with 2 voltage sources
One voltage source
12
12
+ -
+ -
+ -
12
+ -
12
+ - + -
21+ -
+ -
12
+ -+ -
© Siemens AG 2010